Welcome to the forums mspjs, and let me say, I’m very sorry to hear of your loss. I hope I can be of some help here.
The specifications sheet for your camera says that it takes movies in Quicktime format. [I] QuickTime Movie: 320x240/15fps (HQ), 160x120/15fps (SQ) [/I]
You should be able to play Quicktime movies with either the Quicktime player: http://www.apple.com/quicktime/download/
or with VLC media player. www.videolan.org
If you would download and install MediaInfo, http://mediainfo.sourceforge.net/en and use the Tree view within it, you could examine the file and copy and paste the results for us to view. It should be one of the two formats mentioned earlier, but this would confirm that, and should show the audio codec that was used.
I do hope you have made copies of the file and burned to cd’s or dvds by now. You can also copy to a flash drive. Just for safe keeping.